-import android.accounts.Account;
-import android.accounts.AccountManager;
-import android.accounts.AccountsException;
-import android.accounts.AuthenticatorException;
-import android.accounts.OperationCanceledException;
-import android.app.Service;
-import android.content.Intent;
-import android.net.Uri;
-import android.os.Binder;
-import android.os.Handler;
-import android.os.HandlerThread;
-import android.os.IBinder;
-import android.os.Looper;
-import android.os.Message;
-import android.os.Process;
-import android.util.Pair;
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.concurrent.ConcurrentMap;